The Photonics Research Group (about 85 people) is an associated lab of imec and is part of the Department of Information Technology of Ghent University. The group has been active in photonics device research for many years. The managing professors in the group are Roel Baets, Peter Bienstman, Wim Bogaerts, Stephane Clemmen, Bart Kuyken, Nicolas Le Thomas, Geert Morthier, Gunther Roelkens and Dries Van Thourhout. The main research directions are silicon nanophotonics, heterogeneous integration, optical communication, photonic (bio) sensors and photonic integrated circuits for biomedical applications in the near-infrared and mid-infrared wavelength range. More in particular, the silicon nanophotonics work focuses on the design and fabrication of SOI - based photonic devices using standard lithographic techniques compatible with CMOS processing.
Thanks. I’d like to be able to modulate and decode optical orbital momentum. This is not on your list, but is by far the informationally highest density property of light.
Good day Professor, very informative talk. I was wondering if it could be possible to have access to your presentation slides. Rarely, some information are hidden behind you on some videos. I would also like to use them as proper references (with due credit of course). Much appreciated!
I haven't started watching this yet. However I'm doing research. Intel has a PHOTONIC interconnect. I'm looking to acquire one and design a photonic integrated circuit around the photonic interconnect. The device I'm creating would need the capacity to be daisy chained, so modularity is key. Will make another comment after watching this video. Thank you for making this video by the way. And thank the RU-vid algorithm for bringing me here.
Always downplay your own intelligence and give credit away wherever you possibly can. Start by studying history. Understand that there is a lot in of prejudice in math + science; especially in the naming of things. You really need a global outlook.
You can start by building your future, all research needs 2 things, researchers and money. You can decide which part of that equation you want to be on. If you want to be a researcher your go for a stem degree, if you want to earn money go into economics. Both directions require an understanding of math. So ideally see if math is for you, Khan academy has a very good free program that you can do. If you can grasp most of their AP courses then the world is yours.
@@fyfaenihelvete Khan academy has a notorious reputation for inconsistent notation. You need more than money and "education chops", you need to be personable and good at building relationships. I don't think the money is in economics, or mathematics, I think it's in process-related engineering specializations instead. Everything involving metamaterials requires a person to have multiple specializations, EE, MechE, CS, physics, + the whole supply chain + laboratory setup side of things. Many people who get into these kinds of programs are the sorts to have had mentors who themselves were the sort to have built old table-sized microcontrollers from the 80s out of needles, copper wire, and a bunch of homebrew circuits out of dated text books. There is a world of forgotten knowledge that can only be gleamed from other people. Circuits regretfully are one of them. There are many, many, books but few that the majority of people would know to really appreciate.
Hello Kazakhstan Almaty. I propose to develop inventions using new optical fiber. You can earn a lot of money. The Michelson-Morley experiment, let's upgrade it into a school device so it can be used on a bus or an airplane - just like Einstein dreamed.,
Wouldn't you say OpenLight (HPE/Juniper + Synopsis) is working to solve this very scale problem starting with Tower Semiconductor fab? What other companies/consortiums do you see working to solve this problem concretely similar to OpenLight/Tower?
Thank you for this information, i will need to watch your video several times. Can we make small chip which can measure photon without absorbing it similar to this ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-PzZJmujw71s.html?
photonic computation will develop on the back of different fields in computing, such as machine learning, once it is obvious what the limits of binary transistors are.
This is part of a series of independent lectures organized by PhotonHUB Europe (by expertys in the field). But not all these lectures are published on a streaming platform.
- *Introduction to Stimulated Brillouin Scattering (SBS)* : A brief introduction to SBS, a nonlinear interaction between optical photons and acoustic phonons in a photonic waveguide, is provided. The video explains the dispersion diagram and the conditions for forward SBS. - *Fabrication of Freestanding Waveguide on a Photonics Platform* : The video discusses the fabrication of freestanding waveguides on an active silicon photonics platform, IMEC's iSiP50G, with gain and phase modulators. This enables advanced on-chip applications and commercialization. [Watch segment](ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-utJXfmOOwXI.html) - *Design of Brillouin Active Waveguides* : Two different kinds of rib waveguides, FC and SKT, are designed. The waveguides differ in edge depth, and the silicon waveguides are suspended to achieve good acoustic mode confinement. - *Measurement of Stimulated Brillouin Scattering Using Cross-Phase Modulation Scheme* : - The pump is amplitude modulated (carrier and two sidebands) and injected with a weak probe. [Watch segment](ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-utJXfmOOwXI.html) - Cross-phase modulation from the strongly amplified pump leads to modulation of the probe at the output of the waveguides. - A bandpass removes the pump, and a fiber Bragg grating with 2.5GHz bandwidth removes the higher sideband (anti-stokes) from the probe, converting phase modulation into intensity modulation. - A vector network analyzer RF output is fed into an intensity modulator. - Fano resonance is observed from interference of narrow-band SBS and wide-band Kerr nonlinearity. - Each Fano-resonance corresponds to a different mechanical mode in the rib waveguide.
In a brief you made a very clear presentation and I could understand every concept of silicon photonics. You also took care of the latest development in silicon photonics ❤
Can your programmable silicon photonic be used as a general purpose microprocessor ? Can they compete with the small size of transistor based microprocessor
@PhotonicsUGent Do you know whether any project has managed to get the fine tuning of silicon/silicon-dioxide waveguides through stress/strain induction by the use of piezoelectronics instead of resistors to work? This is known to work for a bunch of different III-V semiconductors but I'd really be curious to know whether this has also been achieved for Si/SiO2 waveguides. Thanks!
at 1:44 you can see how it is embedded in a Mach-Zehnder interformetor. That is a device capable of measuring phase shifts compared to a reference arm. The results in the spectra shown there, where the maximum occurs when both signals in the arms have a phase shift of 2pi, the minima occur when the signals are out of phase, a pi phase shift (the phase difference is influence by the wavelenth, as the length difference results in a different phase shift for different wavelengths). (In reality it is any even number of pi to be in phase and any odd to be out of phase, but we dont want the absolute phase difference between the two arms; we want the phase shift compared to 0V when we apply a voltage). When a voltage is aplied this shifts this measured spectrum, and from this one can extract the phase shift resulting at the given voltage. This can be done because we know that when the spectrum is shifted by an amount called the Free Spectral Range (FSR); the distance between two peaks; a phase shift of 2 pi occured in the device compared to the spectrum with 0V. en.wikipedia.org/wiki/Mach%E2%80%93Zehnder_interferometer
